• synonyms


or si·li·cious

[suh-lish-uh s]
See more synonyms for siliceous on Thesaurus.com
  1. containing, consisting of, or resembling silica.
  2. growing in soil rich in silica.
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Origin of siliceous

First recorded in 1650–60, siliceous is from the Latin word siliceus of flint or limestone. See silex, -eous
Related formsnon·si·li·ceous, adjectivenon·si·li·cious, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for silicious



  1. of, relating to, or containing abundant silicasiliceous deposits; a siliceous clay
  2. (of plants) growing in or needing soil rich in silica
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

silicious in Science


  1. Resembling or containing silica.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.